The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 2020
Filed:
Dec. 29, 2014
Bruce Hazeltine, Missoula, MT (US);
Bruce Hazeltine, Missoula, MT (US);
Other;
Abstract
A granular fluidized bed reactor (FBR) for production of high purity silicon is described. The FBR uses a draft tube to promote internal circulation while minimizing voids in the fluidized bed, one significant cause of dust formation. The FBR design has geometries to minimize reactive gas concentration within the draft tube and imposes a desirable circulation pattern in operation. A portion of the FBR wall above a reactive zone provides heat input to maximize deposition on silicon beads while minimizing wall deposition. The FBR is made of carbon composite, ceramic, and graphite materials in a design to minimize contamination and enable silicon deposits to be melted out.